本文整理了Java中org.codehaus.jettison.json.JSONObject.opt()方法的一些代码示例，展示了JSONObject.opt()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。JSONObject.opt()方法的具体详情如下：
包路径：org.codehaus.jettison.json.JSONObject
类名称：JSONObject
方法名：opt

JSONObject.opt介绍

[英]Get an optional value associated with a key.
[中]

代码示例

代码示例来源：origin: json-path/JsonPath

@Override 
public Object getMapValue(Object obj, String key)
{
  Object value = ((org.codehaus.jettison.json.JSONObject)obj).opt(key);
  if( value==null )
  {
    return com.jayway.jsonpath.spi.json.JsonProvider.UNDEFINED;
  }
  return jettisonUnwrap(value);
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional JSONObject associated with a key.
 * It returns null if there is no such key, or if its value is not a
 * JSONObject.
 *
 * @param key   A key string.
 * @return      A JSONObject which is the value.
 */
public JSONObject optJSONObject(String key) {
  Object o = opt(key);
  return o instanceof JSONObject ? (JSONObject)o : null;
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional JSONArray associated with a key.
 * It returns null if there is no such key, or if its value is not a
 * JSONArray.
 *
 * @param key   A key string.
 * @return      A JSONArray which is the value.
 */
public JSONArray optJSONArray(String key) {
  Object o = opt(key);
  return o instanceof JSONArray ? (JSONArray)o : null;
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Determine if the value associated with the key is null or if there is
 *  no value.
 * @param key   A key string.
 * @return      true if there is no value associated with the key or if
 *  the value is the JSONObject.NULL object.
 */
public boolean isNull(String key) {
  return JSONObject.NULL.equals(opt(key)) || JSONObject.EXPLICIT_NULL.equals(opt(key));
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional string associated with a key.
 * It returns the defaultValue if there is no such key.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      A string which is the value.
 */
public String optString(String key, String defaultValue) {
  Object o = opt(key);
  return o != null ? o.toString() : defaultValue;
}

代码示例来源：origin: com.jayway.jsonpath/json-path

@Override 
public Object getMapValue(Object obj, String key)
{
  Object value = ((org.codehaus.jettison.json.JSONObject)obj).opt(key);
  if( value==null )
  {
    return com.jayway.jsonpath.spi.json.JsonProvider.UNDEFINED;
  }
  return jettisonUnwrap(value);
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Construct a JSONObject from a subset of another JSONObject.
 * An array of strings is used to identify the keys that should be copied.
 * Missing keys are ignored.
 * @param jo A JSONObject.
 * @param sa An array of strings.
 * @exception JSONException If a value is a non-finite number.
 */
public JSONObject(JSONObject jo, String[] sa) throws JSONException {
  this();
  for (int i = 0; i < sa.length; i += 1) {
    putOpt(sa[i], jo.opt(sa[i]));
  }
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional long value associated with a key,
 * or the default if there is no such key or if the value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      An object which is the value.
 */
public long optLong(String key, long defaultValue) {
  Object o = opt(key);
  if (o == null) {
    return defaultValue;
  } else {
    try {
      return doGetLong(key, o);
    } catch (JSONException ex) {
      throw new RuntimeException(ex);
    }
  }
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional double associated with a key, or the
 * defaultValue if there is no such key or if its value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      An object which is the value.
 */
public double optDouble(String key, double defaultValue) {
  Object o = opt(key);
  if (o == null) {
    return defaultValue;
  } else {
    try {
      return doGetDouble(key, o);
    } catch (JSONException ex) {
      throw new RuntimeException(ex);
    }
  }
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional boolean associated with a key.
 * It returns the defaultValue if there is no such key, or if it is not
 * a Boolean or the String "true" or "false" (case insensitive).
 *
 * @param key              A key string.
 * @param defaultValue     The default.
 * @return      The truth.
 */
public boolean optBoolean(String key, boolean defaultValue) {
  Object o = opt(key);
  if (o == null) {
    return defaultValue;
  } else {
    try {
      return doGetBoolean(key, o);
    } catch (JSONException ex) {
      throw new RuntimeException(ex);
    }
  }
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get an optional int value associated with a key,
 * or the default if there is no such key or if the value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      An object which is the value.
 */
public int optInt(String key, int defaultValue) {
  Object o = opt(key);
  if (o == null) {
    return defaultValue;
  } else {
    try {
      return doGetInt(key, o);
    } catch (JSONException ex) {
      throw new RuntimeException(ex);
    }
  }
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Get the value object associated with a key.
 *
 * @param key   A key string.
 * @return      The object associated with the key.
 * @throws   JSONException if the key is not found.
 */
public Object get(String key) throws JSONException {
  Object o = opt(key);
  if (o == null) {
    throw new JSONException("JSONObject[" + quote(key) +
        "] not found.");
  }
  return o;
}

代码示例来源：origin: org.codehaus.jettison/jettison

Object o = object.opt(k);
k = k.substring(1);
if (k.equals("xmlns")) {

代码示例来源：origin: org.codehaus.jettison/jettison

Object o = object.opt( k );

代码示例来源：origin: org.codehaus.jettison/jettison

public void writeCharacters(String text) throws XMLStreamException {
  text = text.trim();
  if (text.length() == 0) {
    return;
  }
  try {
    Object o = getCurrentNode().opt("$");
    if (o instanceof JSONArray) {
      ((JSONArray) o).put(text);
    } else if (o instanceof String) {
      JSONArray arr = new JSONArray();
      arr.put(o);
      arr.put(text);
      getCurrentNode().put("$", arr);
    } else {
      getCurrentNode().put("$", text);
    }
  } catch (JSONException e) {
    throw new XMLStreamException(e);
  }
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Produce a JSONArray containing the values of the members of this
 * JSONObject.
 * @param names A JSONArray containing a list of key strings. This
 * determines the sequence of the values in the result.
 * @return A JSONArray of values.
 * @throws JSONException If any of the values are non-finite numbers.
 */
public JSONArray toJSONArray(JSONArray names) throws JSONException {
  if (names == null || names.length() == 0) {
    return null;
  }
  JSONArray ja = new JSONArray();
  for (int i = 0; i < names.length(); i += 1) {
    ja.put(this.opt(names.getString(i)));
  }
  return ja;
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Append values to the array under a key. If the key does not exist in the
 * JSONObject, then the key is put in the JSONObject with its value being a
 * JSONArray containing the value parameter. If the key was already
 * associated with a JSONArray, then the value parameter is appended to it.
 * @param key   A key string.
 * @param value An object to be accumulated under the key.
 * @return this.
 * @throws JSONException If the key is null or if the current value 
 *  associated with the key is not a JSONArray.
 */
public JSONObject append(String key, Object value)
    throws JSONException {
  testValidity(value);
  Object o = opt(key);
  if (o == null) {
    put(key, new JSONArray().put(value));
  } else if (!(o instanceof JSONArray)){
    throw new JSONException("JSONObject[" + key + 
          "] is not a JSONArray.");
  } else {
    ((JSONArray)o).put(value);
  }
  return this;
}

代码示例来源：origin: org.codehaus.jettison/jettison

/**
 * Accumulate values under a key. It is similar to the put method except
 * that if there is already an object stored under the key then a
 * JSONArray is stored under the key to hold all of the accumulated values.
 * If there is already a JSONArray, then the new value is appended to it.
 * In contrast, the put method replaces the previous value.
 * @param key   A key string.
 * @param value An object to be accumulated under the key.
 * @return this.
 * @throws JSONException If the value is an invalid number
 *  or if the key is null.
 */
public JSONObject accumulate(String key, Object value)
    throws JSONException {
  testValidity(value);
  Object o = opt(key);
  if (o == null) {
    put(key, value);
  } else if (o instanceof JSONArray) {
    ((JSONArray)o).put(value);
  } else {
    put(key, new JSONArray().put(o).put(value));
  }
  return this;
}

代码示例来源：origin: org.codehaus.jettison/jettison

value = convention.convertToJSONPrimitive((String)value);
Object old = object.opt(property.getKey());
try {
  if(old != null) {

代码示例来源：origin: org.codehaus.jettison/jettison

Object existing = getCurrentNode().opt(currentKey);
if (existing instanceof JSONObject) {
  JSONArray array = new JSONArray();